IPC refactor part 1: Use explicit separate threads to process requests (#1447)

* Changes to allow explicit management of service threads

* Remove now unused code

* Remove ThreadCounter, its no longer needed

* Allow and use separate server per service, also fix exit issues

* New policy change: PTC version now uses PR number

Ryujinx.HLE/HOS/Kernel/Threading/KThread.cs

@@ -348,6 +348,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
                     if ((SchedFlags & ThreadSchedState.LowMask) == ThreadSchedState.Running)
                     {
                         // TODO: GIC distributor stuffs (sgir changes ect)
+                        Context.RequestInterrupt();
                     }
 
                     SignaledObj   = null;